When in the scene timeline mode, add a quick shortcut for dragging on empty space: Right mouse button
As far as I can see I can't find the option to make a shortcut for just dragging around the timeline (similar to the hand/drag tool in Premiere); I saw the "M" thing, but it doesn't seem to be that responsive. It would be sweet if you could right click on an empty space in your scene timeline and that would just drag the entire timeline. Adversely, it could be ctrl+ click, or alt+ click. Just the option would be nice.
Are you wanting to horizontally scroll the Timeline? Try holding down Shift while spinning the mouse wheel or swiping vertically on a trackpad.
For zoom in/out, hold down Alt/Option while using the mousewheel/trackpad.